TEHRAN, June 30 (Xinhua) -- At least 13 people were killed in an explosion at a medical clinic in the northern district of Iran's capital Tehran on Tuesday, the chief of Tehran Emergency Center was quoted as saying by semi-official Fars news agency.
Six others were injured, Peyman Saberian said.
Firefighters have contained the blaze and are currently searching the building for the trapped people, Jalal Maleki, the spokesman for Firefighting Organization of Tehran told Fars.
The loud explosion and subsequent "vast fire" took place in Sina Medical Clinic in a crowded street near Tajrish square of Tuesday evening.
No report is available about the cause of the explosion. Enditem